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(No Model.) 2 Sheets-Sheet 1. S. B. VAN NORTWIOK.

PRINTING TELEGRAPH. No. 829,51. Patented Nov. 3, 1885.

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(No Model.) 2 Sheets-Sheet S. B. VAN NORTWIOK.

PRINTING TELEGRAPH. I No. 329,515. Patented Nov. 3, 1885.

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UNITED STATES PATENT OFFICE.

SAMUEL B. VAN NORTWIOK, OF NEYV YORK, N. Y.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 329,515, dated November 3, 1885.

Application tiled January 5, 1885. Serial No. 152,058. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL B. VAN Nonr- 'WICK, a citizen of the United States, residing,

in New York, in the county and State of New York, have invented certain new and useful Improvements in Printing Telegraphs, of which the following is a specification.

The invention relates to the construction of The type-wheel of the instrument is rigidly mounted upon a shaft, which is impelled by means of a constant force, and which is permitted to advance step by step by a regulating-pendulum escapement. At a given point in its revolution the type-wheel shaft is designed to be arrested by means of a detent extending into the path of an arm moving with the shaft, provided an electric current is not at that moment transmitted over the main line and through the coils of an electro-magnet designed to move the detent from the path of the stop. In practice it is designedthat such a current shall be automatically transmitted once during each revolution of the type-wheel, and when several instruments are connected in series or with the same transmitter such an impulse serves to release all the type-wheels together. Should one typewheel be slightly in advance of the others, the detent will retain it at the unison-point until the transmission of the releasing impulse,

which permits all the type-wheels to start again in unison. In practice the movements of the type-wheels of the several instruments may thus be so closely regulated as to be maintained in perfect unison through the single revolution which each wheel is required to complete, independently of the transmission of the correcting electric currents. When by any accident any of the wheels may be thrown out of unison, they may be readily brought again into unison by permitting them all to revolve until arrested by the unison-detents.

For the purpose of effectingimpressions, it is designed to employ a printing-lever, which is normally held away from the type-wheel against the attraction exerted by a permanent magnet. This magnet is provided with magnetizing-coils, which, when traversed by a current of electricity in a given direction, cause the armature-lever to respond and the printing-platen to be thrown against the typewheel. When, however, a current traverses these coils in the opposite direction, it serves merely to neutralize the normal magnetism of the permanent magnet without actuating the printing-lever.

In the accompanying drawings, Figure 1 is a diagram showing the general organization of the transmitter adapted to be employed in connection with the receiver. Fig. 2 is a sectional View of the same; and Fig. 3 is a similar diagram illustrating the construction of the receiver, the two being connected by a main line.

For the purpose of operating the receiver, it is required that anelectric impulse should be transmitted for each revolution of the typewheel, and this impulse is of a given polarity. Each time an impression is to be effected a current of the opposite polarity is to be transmitted. For the purpose of readily obtaining these two classes of currents there is employed at the transmitting-station a battery, 0', one pole of which-say the negative-is connected with the earth at G by a conductor, 1. The remaining pole of this batteryis connected by a conductor, 2, with a series of transmitting-keys, k, and these are of any wellknown construction adapted to the purposes. The contact-points of the several keys are connected by conductors 3 with corresponding contact-segments, b, of a segmental drum, B. There are placed upon this wheel a number of contact-segments equal to the number of keys k, and likewise equal to the number of characters upon the peripheries of the typewheel of the receiving-instruments. \Vhen, by the depression of any one of the keys, a circuit-connection is made from the positive pole of the battery 0 to the corresponding contact-segment of the transmitting-wheel B,

it is designed that this circuit-connection shall be completed with the main line L, anda corresponding impulse sent to the receiver for the purpose of effecting an impression of the character corresponding to the key depressed. For this purpose a traveler, O, is employed, and this traveler revolves about the transmit-1 ting-drum B, making successive contact with the segments 1). The traveler O is carried upon the shaft A of the transmitter, and this shaft is connected by a conductor, 4., with the by a conductor, 5,with the conductor 1 at the point 6, and thus with the earth at G. One of the keys, which may be termed the unison or space key,'k, is provided with a yielding contact arm, h, which normally rests against a contact-point, h, and this point is connected by a conductor, 7, with the nega tive pole of the battery 0'. The arm h is connected by a conductor 9, with a corresponding segment, b, of the drum B. When, therefore, the the traveler O is brought into contact with the segment b,'a negative current is transmitted to line. When, however, it is desired to transmit a positive current at. this point instead of a negative current, for the purpose of causing a space to appear uponthe receiving slip at the receiving instrument, the key k is depressed and caused to move the arm h out of contact with the point h and againsta corresponding point, h. The pointh 'is connected with the conductor 2 vand thus with the positive pole of the battery 0. When, therefore, thekey kis depressed andthe traveler 0 makes contact with the corresponding segment, I), a positive current is sent to line, and this] current will serve to actuate the printing-lever in a manner which will hereinafter appear. The same current also serves to, release the type-wheelsin the manner described with reference to the battery-O Upon the shaft A, which carries the traveler C, an escapement wheel, D, is carried. This wheel is provided with a dead, -.beat esc p m n d, the m fwh ch. arecjontrolled by an adjustable pendulum-bob, d, carried uponan arm, d The shaft isintended to be revolved by any suitable force applied through a pinion,' J. The movements of the escap e t p t he ha t teadvance t a regulated speed. Upon the same shaft A there is also carried a ratchet wheel, 13), pro vided with teeth e and a unison detent or stop, F. The unison-stop is designed to be engaged by adetent, f, which is held in the path of the same by a 'retractile spring, f: For theother and with the transmitter.

purpose, however, of removing the detent from thepath'of the stop, an electro-magnet, M, is

employed. This magnet isincluded in the conductor 4, leading to the main line L. If

' an impulse be transmitted from'the battery 0 at the beginning of each revolution of the shaftA, the magnet M. will be vitalized and the arm f drawn out of the path of the stop F. This. impulse, occurring at the commencementvof eachrevolution of the shaft, is designed to insure that all the instruments included in the main line L or connected with the transmitter shall be in unison with each Itwill be observed, however, that the magnet M will respond alsoto the currents transmitted from the printing-battery O, and the arm f will respond thereto. A pawl, f carried upon this arm, is caused by the movement of the same to engage the teeth of the ratchet-wheel E, and to thus arrest the shaft Ain the position which it assumes at the moment the printing impulse is transmitted. When, however, the arm f is actuated by a unison impulse, the pawl f enters a space upon the periphery of the ratchet-wheel E, from which a, tooth hasbeen removed, and it does not, therefore, interfere with the movements of the shaft A. When the shaft A has been arrested by the pawl f it will remain so arrested until the key which has caused the printing-current to be trans mitted is released and the circuit of the battery O is thereby interrupted.

Considering now. the organization of the receiving-instrument shownin Fig. 3, T represents the type-wheel, which is carried upon a shaft, A. This shaft is equipped with a scape-wheel, D, and escapementanchor pendulum aland pendulum d, similar to the corresponding parts described with reference to the transmitting device. This escapement device is adjusted to permit the revolution of theshaft A with a rapidity corresponding as nearly as possible to that of the shaft A, and when several instruments are included in the system they are all so adjusted as to, revolve as nearly as, possible-in unison. Upon the shaft A therefis also. carried a ratchet-wheel, E, provided with teeth 6. A unison-stop,

F, is also mounted upon the shaft A, and this is, designed to, be engaged by a. detent, P, and to be released therefrom through the. instrumentality of an electro-magnet, M. This electrovmagnet M, together with the unison stop. and detent, serve precisely the same purpose as described with reference tothe cor-responding parts of the transmitter. The magnet M responds to currents of bothpolarities, and when actuated by the current from, the battery 0? the shaft A is, permittedto advance and themovements of the wheel E are not intercepted for thereason; that one ofthe teeth 0 is removed at the corresponding point upon the periphery of the wheel. When, however, themagnet M is actuated at any other point in the revolution of the shaft A, a detent, 0, will be brought into engagement with the correspond ing tooth upon the wheel E and arrest the shaft A. Thus when a current is transmitted from the battery 0' by the depression of one of the keys, k, the type-wheel shaft A will be arrested and held until it is released by an interruption of the current.

For the purpose of effecting an impression by the current transmitted from the battery 0', an elecro-magnet, N. is employed. This electro-magnet is normally polarized by a permanent magnet, M, and when traversed by currents from the battery 0 the normal polarization of the magnetisincreased. Ourrents from the battery 0 however, serve merely to neutralize the normal polarization of the cores of the magnets. An armaturelever, 91, carrying an armature, n, is applied to this electro-magnet. A retractile spring, 8', serves to normally maintain the armaturelever and a platen, n carried thereon, away from the type-wheel T. \Vhen, however, the normal magnetism of the electro-magnet P is increased bya current from the battery O,the armature n responds and the platen n is impelled against the periphery of the type-wheel. The currents from the battery 0 will not, however, actuate the printing-lever.

I claim as my invention 1. The combination, substantially as hereinbefore set forth, with a type-wheel and a shaft carrying the same, of a mechanical escapement applied to said shaft, a stop carried uponsaid shaft, a detent normally standing in the path of said stop, means, substantially such as described, for removing said detent from the path of said stop once in each revolution of the typewheel shaft, a printingplaten, and means, substantially such as described, for actuating said platen at will.

2. The combination, substantially as hereinbefore set forth, with a type-wheel and its shaft, of a stop moving with said type-wheel shaft, a detent normally standing in the path of said stop, means for removing said detent from the path of said stop once in each revolution of the shaft, a printing-platen, means, substantially such as described, for actuating the same by currents of a given polarity, a

ratchet-wheel moving with said shaft, and a pawl moving with said detent, which pawl engages the teeth of said ratchet-wheel when said printing-platen is actuated.

3. The combination, substantially as hereinbefore set forth, with a type-wheel and its shaft, of a mechanical escapement applied thereto, means for actuating said shaft, aunison-arm moving with said shaft, a detent normally standing in the path of said unisonarm, an electro-magnet for removing said detent from the path of said arm, which electromagnet responds to currents of either polarity, a printing-platen, an electro-magnet for actuating theffsame, which magnet; responds to currents of one polarity only, a ratchet-wheel moving with said type-wheel shaft, and a detent actuated by said unison-magnet and serving to engage the teeth of said ratchetwheel except when said wheel is in a given position when the printing-magnet is vitalized, thereby arresting said type-wheel.

4. The combination, substantially as hereinbefore set forth, with a type-wheel, a typewheel shaft, and means for revolving the same, of a mechanical escapement applied thereto, a ratchet-wheel moving with said shaft,a unisonarm carried upon said shaft, a detent applied to said unison-arm, means for automatically removing said detent from the path of said unison-arm, a printing-platen applied to said type-wheel, a permanent magnet provided with magnetizing-coils and applied to said printing-platen, and means, substantially such as described, for transmitting currents through said unison-magnet once in each revolution of the type-wheel in a given direction, and for transmitting currents in the opposite direction through the coils of said printing-magnet at will.

In testimony whereof I have hereunto subscribed my name this 22d day of December, A. D. 1884.

SAMUEL B. VAN NORTVVIOK.

Witnesses:

DANL. W. EDGECOMB, CHARLES A. TERRY. 

